NCERT STD 6 SCIENCE FIBER TO FABRIC 30 MARK TEST PDF

Fabrics are made up of strands called yarns, which are made from even thinner strandsFabrics are made up of strands called yarns, which are made from even thinner strands, called fibres. Cotton, silk, wool and jute are called natural fibres as they are obtained from natural sources. We get cotton and jute from plants. We get silk from the cocoons of silk worms. Synthetic fibres like nylon, polyester and acrylic were invented about a hundred years ago. These are man-made and are not obtained from any plant or animal sources. Cotton fibre is obtained from cotton plants that grow in black soil in a warm climate. In India, cotton is grown in Gujarat, Maharashtra, Andhra Pradesh, Punjab, Haryana, Karnataka, Tamil Nadu, Rajasthan, Orissa and Madhya Pradesh. The cotton plant bears fruits about the size of a lemon, called cotton bolls. The bolls are full of seeds and cotton fibre. They burst open when they are ripe.

The cotton fibres are collected by hand from the ripe cotton bolls. This process is called picking.

Next, the cotton fibres are separated from the seeds by combing them. This is known as ginning.

Earlier, ginning was done by hand, but nowadays, a machine is used.

Jute fibre comes from jute plants, which are mainly grown in places that have high temperatures and plenty of rainfall. Jute is cultivated during the rainy season. In India, jute is cultivated in West Bengal, Bihar, Andhra Pradesh, Uttar Pradesh, Assam, Chhattisgarh and Tripura.CLICK BELLOW LINK FOR UNIT TEST